Book Image

Mastering TypeScript - Fourth Edition

By : Nathan Rozentals
4.7 (3)
Book Image

Mastering TypeScript - Fourth Edition

4.7 (3)
By: Nathan Rozentals

Overview of this book

TypeScript is both a language and a set of tools to generate JavaScript, designed by Anders Hejlsberg at Microsoft to help developers write enterprise-scale JavaScript. Mastering Typescript is a golden standard for budding and experienced developers. With a structured approach that will get you up and running with Typescript quickly, this book will introduce core concepts, then build on them to help you understand (and apply) the more advanced language features. You’ll learn by doing while acquiring the best programming practices along the way. This fourth edition also covers a variety of modern JavaScript and TypeScript frameworks, comparing their strengths and weaknesses. You'll explore Angular, React, Vue, RxJs, Express, NodeJS, and others. You'll get up to speed with unit and integration testing, data transformation, serverless technologies, and asynchronous programming. Next, you’ll learn how to integrate with existing JavaScript libraries, control your compiler options, and use decorators and generics. By the end of the book, you will have built a comprehensive set of web applications, having integrated them into a single cohesive website using micro front-end techniques. This book is about learning the language, understanding when to apply its features, and selecting the framework that fits your real-world project perfectly.
Table of Contents (19 chapters)
17
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18
Index

Interfaces, Classes, Inheritance, and Modules

We have already seen a variety of language enhancements that TypeScript brings to modern JavaScript development. This includes the primitive types, like string, number, boolean, undefined, and never, as well as features brought in from multiple ECMAScript standards, like let, const, and optional chaining. TypeScript, therefore, allows us to use these enhanced language features from future JavaScript standards in our code right now, and it takes care of generating the correct JavaScript based on our runtime target.

The ECMAScript standard published in 2015, known as ES6, introduced the concept of classes and inheritance. JavaScript programmers, however, have been able to create classes and use object-oriented programming techniques for many years, by using what is known as the closure design pattern and the prototype design pattern. The creation of JavaScript objects through closures, however, has been more by convention than being...